five years ago after our wedding in angeles, and traveling alone, I was returning with Emirates, and after an eleven hour wait in the terminal at dubie I was first at the gate, (the only one at the gate when the check in girl turned up), she put my ticket in the machine and anounced you have been upgraded to first class,
After my wife gave birth here in the UK we were traveling home for a vist with KLM, 13 hrs straight from amsterdam, the daughter didnt require her own seat, as she was less than two years of age, she sat on my knee, we were in the two outside seats (window) aisle with a stranger in the third seat, (nice chap by the way), traveling alone, about an hour into the flight the stewardess came along and offered the guy a seat in first class so that our daughter could have a seat to herself,
I have experienced upgrades first hand twice within three trips with two different airlines.